Malicious PDF — malware analysis report

Static analysis result for SHA-256 7386ad5c9fa88a79…

MALICIOUS

PDF

69.7 KB Created: 2021-02-14 22:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5bb75baba1e8c9d3009288cd017b50ce SHA-1: dd2e7152d84df32847e3f32609ffa99ea210ceed SHA-256: 7386ad5c9fa88a792de052a7723d74971c777e0ccc41a3740a584204d630bc0b
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=does+fedex+offer+notary+services In PDF document text
    • https://cdn.sqhk.co/lexelinowe/fQggiif/41428180338.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/MlTwFjb/painter_mobile_full_apk_free_download.pdfIn PDF document text
    • http://trikotoria.ru/gikifesonusamizovipof2wa9.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/ghfErsI/36796115781.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/i7At2GI/used_drum_set_for_sale_in_nigeria.pdfIn PDF document text
    • https://cdn.sqhk.co/derilunadine/idYuha5/home_assistant_switch_panel.pdfIn PDF document text
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/fotaluxaled.pdfIn PDF document text
    • http://luxshop21.site/atwood_tankless_water_heater_service_manualuljsx.pdfIn PDF document text
    • http://vipadminler.org/world_history_study_guide_unit_1jtx7p.pdfIn PDF document text
    • https://gofizunesiwez.weebly.com/uploads/1/3/0/8/130874053/vexubav.pdfIn PDF document text
    • http://rijupoxog.22web.org/genuvalezinotix.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/jJ0Iyjh/84583478385.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/ejdic1L/12053810723.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/xofananesodide_dezukirarazen_raraxezajusov_jabomerameserit.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/ltJUhhR/maze_runner_the_death_cure_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatikob.epizy.com/countermeasure_report_example.pdfIn PDF document text
    • http://kogosiji.epizy.com/xoxudatalovedix.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F1 5212 bytes
SHA-256: d0e0c26a59bae68d185d4524051c2eacbf8fe6a77ec0f341666851985bd0d6c5
font_01_sfnt_off0000e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 9904 bytes
SHA-256: 08111404b13e90bb1edf66bb2170507210d80b149e09ce714c80297eb3164cf7

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